EP 0476800 A2 19920325 - Large signal three-level superfluorescent fiber sources.
Title (en)
Large signal three-level superfluorescent fiber sources.
Title (de)
Superfluoreszierende Dreiniveau-Faserlichtquellen von hoher Ausgangsleistung.
Title (fr)
Sources superfluorescentes à trois niveaux à haute puissance en fibre optique.
Publication
Application
Priority
- US 58480690 A 19900918
- US 66626491 A 19910307
Abstract (en)
There is disclosed a new superfluorescent source comprising a long fiber doped with a lasing material presenting three-level transitions, such as Erbium. Due to the ground state signal absorption present in three-level systems, the source of the present invention can achieve backward signal quantum efficiencies well in excess of the limit of 0.5 exhibited by four-level systems. The source can be used in a Sagnac interferometer which may comprise an optical isolator because of possible high feedback. <IMAGE>
IPC 1-7
IPC 8 full level
G01B 9/02 (2006.01); G01C 19/72 (2006.01); G02F 1/35 (2006.01); H01S 3/06 (2006.01); H01S 3/067 (2006.01); H01S 3/07 (2006.01); H01S 3/083 (2006.01); H01S 3/094 (2006.01); H01S 3/0947 (2006.01); H01S 3/17 (2006.01)
CPC (source: EP)
G01B 9/0209 (2013.01); G01C 19/721 (2013.01); H01S 3/06795 (2013.01); G01B 2290/70 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0476800 A2 19920325; EP 0476800 A3 19921230; EP 0476800 B1 19960228; CA 2042255 A1 19920319; DE 69117405 D1 19960404; DE 69117405 T2 19960718; JP 2665572 B2 19971022; JP H05136493 A 19930601
DOCDB simple family (application)
EP 91302184 A 19910314; CA 2042255 A 19910509; DE 69117405 T 19910314; JP 16813791 A 19910709